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Merge branch 'docs/container-scanning-nfs-bug' into 'master' 

Mention Container Scanning NFS bug and how to fix it

Closes gitlab-ee#11429

See merge request gitlab-org/gitlab-ce!29908
This commit is contained in:
Mike Lewis 2019-06-21 14:05:04 +00:00
parent 44db34182e 511e67e5ab
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doc/user/application_security/container_scanning/index.md
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@ -40,6 +40,9 @@ To enable Container Scanning in your pipeline, you need:
[`kubernetes`](https://docs.gitlab.com/runner/install/kubernetes.html#running-privileged-containers-for-the-runners)
executor running in privileged mode. If you're using the shared Runners on GitLab.com,
this is enabled by default.
- Docker `18.09.03` or higher installed on the machine where the Runners are
running. If you're using the shared Runners on GitLab.com, this is already
the case.
- To [build and push](../../../ci/docker/using_docker_build.md#container-registry-examples)
your Docker image to your project's [Container Registry](../../project/container_registry.md).
The name of the Docker image should match the following scheme:
@ -202,3 +205,20 @@ vulnerabilities in your groups and projects. Read more about the
Once a vulnerability is found, you can interact with it. Read more on how to
[interact with the vulnerabilities](../index.md#interacting-with-the-vulnerabilities).
## Troubleshooting
### docker: Error response from daemon: failed to copy xattrs
When the GitLab Runner uses the Docker executor and NFS is used
(e.g., `/var/lib/docker` is on an NFS mount), Container Scanning might fail with
an error like the following:
```
docker: Error response from daemon: failed to copy xattrs: failed to set xattr "security.selinux" on /path/to/file: operation not supported.
```
This is a result of a bug in Docker which is now [fixed](https://github.com/containerd/continuity/pull/138 "fs: add WithAllowXAttrErrors CopyOpt").
To prevent the error, ensure the Docker version that the Runner is using is
`18.09.03` or higher. For more information, see
[issue #10241](https://gitlab.com/gitlab-org/gitlab-ee/issues/10241 "Investigate why Container Scanning is not working with NFS mounts").